The integration of a breeding blanket (BB) in a stellarator reactor poses a major challenge due to the intricate geometry and the reduced free space between plasma and coils and between neighbouring coils, which also makes maintenance by remote handling techniques difficult. Conversely, in comparison with tokamaks, the BB can benefit significantly from the steady-state operation of stellarators. While previous studies have pointed to the feasibility of a dual coolant lithium lead (DCLL) BB in stellarators such as HELIAS-5B, each device introduces a different set of geometrical constraints and integration requirements that must be addressed through a dedicated design approach. This work presents a sequential study on several aspects that have clear impact on the functionality and efficiency of a DCLL BB integrated into a stellarator design based on the CIEMAT-QI4X plasma configuration. The proposal aims to achieve accurate alignment between the magnetic field and the liquid metal flow to avoid electric insulation of the liquid metal circuits as much as possible. Although it has yet to be confirmed through numerical analysis or experimental testing, the specific alignment strategy proves to be highly effective in reducing pressure drop in the liquid metal circuits. Besides, the neutronic results point to an excellent performance in terms of tritium breeding provided there is an optimal use of the available space between the plasma and the coils, although some arrangements must be done to satisfy also the contemplated shielding requirements. Furthermore, the internal design of the blanket segments and the optimisation of the cooling system allows achieving a valuable performance in terms of balance of plant, while meeting the structural integrity criteria that have been studied at a very preliminary stage.
恒星状器反应堆中增殖包层（BB）的集成由于复杂的几何结构以及等离子体与线圈之间、相邻线圈之间可用自由空间的减少而构成重大挑战，这也使得通过远程操控技术进行维护变得困难。相反，与托卡马克相比，BB可以从恒星状器的稳态运行中显著受益。尽管先前的研究已指出双冷却剂锂铅（DCLL）BB在诸如HELIAS-5B等恒星状器中的可行性，但每种装置都会引入一组不同的几何约束和集成要求，这些必须通过专门的设计方法加以解决。本工作针对基于CIEMAT-QI4X等离子体构型的恒星状器设计中集成DCLL BB的若干方面进行了系统性研究，这些方面对其功能性和效率具有明显影响。该方案旨在实现磁场与液态金属流动之间的精确对准，以尽可能避免液态金属回路的电绝缘问题。尽管该对准策略尚需通过数值分析或实验测试加以确认，但它在降低液态金属回路压降方面被证明极为有效。此外，中子学结果表明，只要充分利用等离子体与线圈之间的可用空间，其在氚增殖方面表现出优异的性能，尽管仍需进行某些调整以满足所考虑的屏蔽要求。再者，包层段的内部设计以及冷却系统的优化使得在电厂热力循环平衡方面实现了有价值的性能，同时满足了已在非常初步阶段进行研究的结构完整性标准。